'Lystrosaurus' presentation slideshows

Prehistoric Landmasses

Prehistoric Landmasses. Gondwanaland. The hypothetical protocontinent of the Southern Hemisphere According to the theory of plate tectonics broke up into India, Australia, Antarctica, Africa, and South America. . Glossopteris. Glossopteris. Plant fossil

1.39k views • 29 slides

Contracting Earth Theory

Contracting Earth Theory. The molten Earth cools and contracts The crust wrinkles and crumples Mountains form. What are some problems with this hypothesis? What observations do you know of that may contradict this idea?. The Expanding Earth. 20 th century - radioactive decay

459 views • 23 slides

Continental Drift

204 views • 10 slides